Adaptive Linear Quadratic Control for High Dynamical and Comfortable Behavior of a Heavy Truck

During the last few years numerous innovations in advanced driveline control have improved the performance of commercial vehicles. In this context a major goal of driveline control is the enhancement of dynamical behavior and driving comfort. However, fast engine torque changes during Tipin and Tipout operations improve the dynamical behavior but induce unintentional driveline jerking at the same time. Due to this fact that comfort is contradictory to dynamic, a control strategy is necessary, which can handle with both targets at the same time. Based on a simple model of the driveline two Linear Quadratic (LQ) controllers are developed: A comfort controller, which damps the driveline oscillations, and a dynamic controller, which guarantees a high dynamical performance. However, as both controllers have different targets it is not possible to activate both at the same time. Therefore, a fusion of both manipulated variables dependant on the driving situation and the drive input is integrated.

File Size: 819K

Included in: SP-2147

See papers presented at SAE World Congress & Exhibition, April 2008, Detroit, MI, USA, Session: Transmission and Driveline: (Part 3 of 4) Controls

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